第五步:
发一些硬件的图片。让人有个直观的认识。
DF的电源模块
5v2A移动电源,必须是用2A来驱动,否则无法工作。
电机驱动的型号不详,某宝里买的-MX1508-2路直流电机驱动模块 正反转 PWM调速 双H桥步进电机迷你超L298N。
小车底盘是自己改装的。
第六步:总体介绍
摄像头小车的设计系统是由ESP32-cam,电机驱动和电源模块来完成的。可以实现小车的前进,后退,左转和右转。开灯,打开伺服等动作,操控起来没有迟滞感,流视频也很流畅。
第七步:连线图
第八步:代码部分的设计
代码部分的WIFI密码等要填你自己的信息。
这个代码是主文件,其它几个支持文件是从样例里直接拷贝的。上图手写ok字样那张上面有支持文件的名称。
/@@* This sketch is made by gada888 2020-7-27 const char* ssid = "xxxxx"; const char* password = "xxxxx"; #include "esp_camera.h" #include <wifi.h> #include "soc/soc.h" #include "soc/rtc_cntl_reg.h" // WARNING!!! Make sure that you have either selected ESP32 Wrover Module, // or another board which has PSRAM enabled //CAMERA_MODEL_<a class="decoration-color" href="https://www.icxbk.com/search.html?type=article&page=1&keywords=AI" target="_blank">AI</a>_THINKER #define PWDN_GPIO_NUM 32 #define RESET_GPIO_NUM -1 #define XCLK_GPIO_NUM 0 #define SIOD_GPIO_NUM 26 #define SIOC_GPIO_NUM 27 #define Y9_GPIO_NUM 35 #define Y8_GPIO_NUM 34 #define Y7_GPIO_NUM 39 #define Y6_GPIO_NUM 36 #define Y5_GPIO_NUM 21 #define Y4_GPIO_NUM 19 #define Y3_GPIO_NUM 18 #define Y2_GPIO_NUM 5 #define VSYNC_GPIO_NUM 25 #define HREF_GPIO_NUM 23 #define PCLK_GPIO_NUM 22 void startCameraServer(); void setup() { WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0); Serial.begin(115200); Serial.setDebugOutput(true); Serial.println(); camera_config_t config; config.ledc_channel = LEDC_CHANNEL_0; config.ledc_timer = LEDC_TIMER_0; config.pin_d0 = Y2_GPIO_NUM; config.pin_d1 = Y3_GPIO_NUM; config.pin_d2 = Y4_GPIO_NUM; config.pin_d3 = Y5_GPIO_NUM; config.pin_d4 = Y6_GPIO_NUM; config.pin_d5 = Y7_GPIO_NUM; config.pin_d6 = Y8_GPIO_NUM; config.pin_d7 = Y9_GPIO_NUM; config.pin_xclk = XCLK_GPIO_NUM; config.pin_pclk = PCLK_GPIO_NUM; config.pin_vsync = VSYNC_GPIO_NUM; config.pin_href = HREF_GPIO_NUM; config.pin_sscb_sda = SIOD_GPIO_NUM; config.pin_sscb_scl = SIOC_GPIO_NUM; config.pin_pwdn = PWDN_GPIO_NUM; config.pin_reset = RESET_GPIO_NUM; config.xclk_freq_hz = 20000000; config.pixel_format = PIXFORMAT_JPEG; //init with high specs to pre-allocate larger buffers if(psramFound()){ config.frame_size = FRAMESIZE_UXGA; config.jpeg_quality = 10; //0-63 lower number means higher quality config.fb_count = 2; } else { config.frame_size = FRAMESIZE_SVGA; config.jpeg_quality = 12; //0-63 lower number means higher quality config.fb_count = 1; } // camera init esp_err_t err = esp_camera_init(&config); if (err != ESP_OK) { Serial.printf("Camera init failed with error 0x%x", err); delay(1000); ESP.restart(); } //drop down frame size for higher initial frame rate sensor_t * s = esp_camera_sensor_get(); s->set_framesize(s, FRAMESIZE_QVGA); // UXGA|SXGA|XGA|SVGA|VGA|CIF|QVGA|HQVGA|QQVGA //Servo ledcAttachPin(2, 3); ledcSetup(3, 50, 16); ledcWrite(3, 4850); //Flash ledcAttachPin(4, 4); ledcSetup(4, 5000, 8); //Wheel ledcAttachPin(12, 5); //You can adjust the speed of the wheel. (gpio12, gpio13) ledcSetup(5, 5000, 8); ledcAttachPin(13, 6); ledcSetup(6, 5000, 8); ledcWrite(6, 0); pinMode(15, OUTPUT); //If I output PWM to GPIO 15 using ledcWrite, it will lose control. Why? pinMode(14, OUTPUT); Serial.println("ssid: " + (String)ssid); Serial.println("password: " + (String)password); WiFi.begin(ssid, password); long int StartTime=millis(); while (WiFi.status() != WL_CONNECTED) { delay(500); if ((StartTime+10000) < millis()) break; } startCameraServer(); char* apssid = "ESP32-CAM"; char* appassword = "12345678"; //AP password require at least 8 characters. Serial.println(""); Serial.println("WiFi connected"); Serial.print("Camera Ready! Use 'http://"); if (WiFi.status() == WL_CONNECTED) { Serial.print(WiFi.localIP()); Serial.println("' to connect"); WiFi.softAP((WiFi.localIP().toString()+"_"+(String)apssid).c_str(), appassword); for (int i=0;i<5;i++) { ledcWrite(4,10); delay(200); ledcWrite(4,0); delay(200); } } else { Serial.print(WiFi.softAPIP()); Serial.println("' to connect"); WiFi.softAP((WiFi.softAPIP().toString()+"_"+(String)apssid).c_str(), appassword); for (int i=0;i<2;i++) { ledcWrite(4,10); delay(1000); ledcWrite(4,0); delay(1000); } } } void loop() { // put your main code here, to run repeatedly: delay(10000); }
代码烧录完后,在手机上打开浏览器,在地址栏输入你在Fing软件里看到的ESP32的IP地址,之后便可以看到你想看的html页面了。